<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        *{
            margin: 0;
            padding: 0;
        }
        div{
            width: 100%;
            height: 300px;
            background-size: 100%;
            background-attachment: fixed;
        }
        .box1{
            background: url(./img/1.jpg) no-repeat;
            background-size: 100%;
            background-attachment: fixed;
        }
        .box2{
            background: url(./img/2.jpg) no-repeat;
            background-size: 100%;
            background-attachment: fixed;
        }
        .box3{
            background: url(./img/3.jpg) no-repeat;
            background-size: 100%;
            background-attachment: fixed;
        }
        input{
            margin-left: 200px;
        }
        input::before{
            content: 'hello';
            color: red;
            width: 20px;
            height: 10px;
        }
        p::before{
            content: 'before';
            color:red;
        }
    </style>
</head>
<body>
    <div class="box1">
        <input type="text" placeholder="请输入" autocomplete autofocus>
    </div>
    <div class="box2">
        <div>
            千求千应，万愿万从！
        </div>
    </div>
    <div class="box3">
        <table>
            <th>
                <td>1</td>
                <td>2</td>
                <td>3</td>
            </th>
            <tr>
                <td>789456</td>
            </tr>
        </table>
        <p color:'blue'>lelllll</p>
    </div>
</body>
</html>